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Search for an additional, heavy Higgs boson in the HZZ decay channel at √s = 8 TeV in pp collision data with the ATLAS detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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Number of Authors: 2853
2016 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, no 1, 45Article in journal (Refereed) Published
Abstract [en]

A search is presented for a high-mass Higgs boson in the , , , and decay modes using the ATLAS detector at the CERN Large Hadron Collider. The search uses proton-proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb. The results of the search are interpreted in the scenario of a heavy Higgs boson with a width that is small compared with the experimental mass resolution. The Higgs boson mass range considered extends up to for all four decay modes and down to as low as 140 , depending on the decay mode. No significant excess of events over the Standard Model prediction is found. A simultaneous fit to the four decay modes yields upper limits on the production cross-section of a heavy Higgs boson times the branching ratio to boson pairs. 95 % confidence level upper limits range from 0.53 pb at GeV to 0.008 pb at GeV for the gluon-fusion production mode and from 0.31 pb at GeV to 0.009 pb at GeV for the vector-boson-fusion production mode. The results are also interpreted in the context of Type-I and Type-II two-Higgs-doublet models.

Place, publisher, year, edition, pages
2016. Vol. 76, no 1, 45
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Physical Sciences
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URN: urn:nbn:se:uu:diva-279519DOI: 10.1140/epjc/s10052-015-3820-zISI: 000368711500001OAI: oai:DiVA.org:uu-279519DiVA: diva2:908309
Note

ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-015-3820-z

Funding: SCOAP3

Available from: 2016-03-02 Created: 2016-03-02 Last updated: 2017-11-30Bibliographically approved

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Bergeås, Elin KuutmannBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P. O. JoakimIsaksson, CharlieMedsen, AlexanderÖhman, HenrikPelikan, DanielRangel-Smith, Camilla

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Bergeås, Elin KuutmannBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P. O. JoakimIsaksson, CharlieMedsen, AlexanderÖhman, HenrikPelikan, DanielRangel-Smith, Camilla
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